‘Western Pride’ was a former Port of Bristol Authority loco, and from the 1970s to 1987, it took loaded coal wagons from Ashton Meadows to Wapping Wharf sidings and the Coal Depot (Western Fuels) there, and returned empty wagons to the sidings.
As loaded coal wagons left overnight had a tendency to get vandalised, there was a secure storage compound at the coal depot, where the loco and wagons were stored overnight.

Western Fuels ex PBA 0-6-0 D1171 standing at Wapping Wharf, July 1979 (Courtesy Kevin Redwood)

D.1171 made her last trip along the BHR in May 1987, on an overnight move to the coal depot at Filton. She has since been sold into preservation, and after a period in store outside at MOD Long Marston (As seen in this picture by Cliff Jones Photography), restoration has begun, as seen here (March 2013):

Image is property of Mike Cottam and appears here as a direct link to his flickr page